Split logtags implementations for cc and java

Logtags files in cc and java are treated fundamentally differently.
In cc, they are not used for compiling at all, but need to be passed
to Make to be combined into the global logtags list, and logtag files
are listed in a logtags property.  In java they are listed in srcs
and produce generated code that is compiled in, and so shouldn't
also need to be listed in a logtags property.

Move the logtags property to cc and export it to Make from there,
and have java extract logtags files from srcs to be exported to
Make.

Test: m checkbuild
Change-Id: I31d49289efe72db60d2f33566df771b4a3ebc8a0

android/module.go

@@ -214,10 +214,6 @@ type commonProperties struct {
 	// whether this module is device specific and should be installed into /vendor
 	Vendor *bool
 
-	// *.logtags files, to combine together in order to generate the /system/etc/event-log-tags
-	// file
-	Logtags []string
-
 	// init.rc files to be installed if this module is installed
 	Init_rc []string